The answer is D. The program prints:
[44, 42, 41, 14, 9, 7]

Why?
sort() puts the list in order, smallest first. reverse=True flips it, so the biggest comes first. It changes the list itself.
The code again
scores = [14, 41, 9, 42, 44, 7]
scores.sort(reverse=True)
print(scores)
Try it: change one number in the program and predict the new output before you run it.